<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>奥运五环</title>
    <style>
        .flag {
            width: 300px;
            height: 180px;
            margin: 50px;
            border: 1px solid #666;
        }
        .flag div {
            width: 100px;
            height: 100px;
            border-radius: 50%;
        }
        .circle1 {
            border: 8px solid black;
        }
        .circle2 {
            border: 8px solid blue;
            position: relative;
            top: -116px;
            left: 80px;
        }
        .circle3 {
            border: 8px solid red;
            position: relative;
            top: -232px;
            left: 160px;
        }
        .circle4 {
            border: 8px solid yellow;
            position: relative;
            top: -300px;
            left: 40px;
        }
        .circle5 {
            border: 8px solid green;
            position: relative;
            top: -416px;
            left: 120px;
        }
    </style>
</head>
<body>
    <div class="flag">
        <div class="circle1"></div>
        <div class="circle2"></div>
        <div class="circle3"></div>
        <div class="circle4"></div>
        <div class="circle5"></div>
    </div>
</body>
</html>